Leno jumper saddle



Jan. 31, 1933. c 1 UNDEGREN 1,895,805

LENO JUMPER SADDLE Filed Aug. 22, 1931 Jmfentor I CAN J. Lmdegr'en (lttornegs Patented Jan. 31, 1933 NITED FVPATENT OFFICE cam. .1. LINDEGBEN, on rnovinnnon, RHODEIISLAND, Assienoa 'r'o cnomr'ron a i KNOWLES LOOIMI WORKS, OFWORCESTER, MASSACHUSETTS, A CORPORATION msncnnsnr'rs I a Y LnNo Jinurnn SADDLE I Application filed August 22, 193 Serial No. 558,770. v

This invention relates to, leno or cross weaving looms audit is the general object of the invention to improvethe support for the looped link used in the Connection ofthe' leno harness frames. 1 I

In cross or leno weaving it is customary to give certain of the harness frames eitherhalf movements, or full movements, depending upon whether mesh or heading fabric is be ing woven. I harness frames move from low position to mid-position to permit shogging of the needle frame, after which these frames are low ered to cross their warps with those ofthe needle frame. In'some fabrics there is an occasional strip of plain, or non-mesh, fabric, in the weaving of which the aforesaid lframes move in the usualmanner, that is, from low to high position and return. i

Two separate actuators may be employed to give these results, the ordinary harness jack for the full motion when weaving plain, and a half-and-return, or jumper when weaving leno. The connections to the harness frames include hollow or loop links through which the jacks extend and to one end of which are attached the leno or jumper actuators. When the jumper is active the jack" is in low position so as not to interfere with the half-and-return motion of the harness frames. i p It is an important object of my invention to provide a support or saddle for the link so constructed that it will be held in place on the jack by its own weight. A further object is to form the saddle with a curved upper edge or-surface to permit the link to remain in the same positionvertically without varying the shed as the jack moves. p

7 Another object of theinventionis to provide a readily adjustablesaddle movable by hand to the desired notch and arranged to fall into. holding or locked position on the jack. In this connection the link is formed with ears one of which will act to hold the saddle to jar loose When weaving mesh certain saddle in the selected notch when the jack is operative. In this way any tendency of'the by the motion of the ack is prevented. v

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims. 7

In the accompanying drawing', wherein a embodiment of myinvention is V convenient set forth, r

1 is a front elevation of a dobby with my invention applied thereto,

Fig. 2 is a perspective .view of the'upper end of a dobby harness 'jack showingm'y invention held in position in one of the/ notches ofthe'jack,, U Fig. 3 is anenlarged front elevation of the saddle, and j 1 y Fig. 4 is atop plan view taken in the direction of arrow 4, Fig.3. I l Q Referring tothe drawing, I have shown the dobby frame having a harness jack 1 1 pivoted thereto and along the upper right hand edge of whichis a series of notches 12.

The harnesssheave 13 may bexproperly supported by the loom frame and have extended therearound a harness cord 14. The latter is connected to a hollow or loop link 15 the right hand end of which as shown in Fig.

.lis attached to astrap 16. The upper'end of the harness jack passes through the looped link the slot in which is of greater length than the width of the jack. I

A sector 17 is pivoted as at 18 and is swun by a train of parts including a toggle l'in 19. The actuation of the train is through a rod 20 driven by rocker arm 21 ofthe dob:-

The dobby jack 11 maybe moved by le- 7 ver22 in the usual manner and has an amplitude of motion greater than that of theis'ector 17.' 1

When leno is being woven the'jack will be in a'position corresponding-to the down por ,sition. of the corresponding harness frame and the sector will be effective to give said leno fabric, the jack 'Will be moved from the frame a half movement without disturbing ,the'jack. When it is desired to discontinue leno and start the weaving of some nonframe a'full or complete movement. It is to be understood that the sectoroperates. merely to raise the warps to mid-position and then, after a lateral shift, lets the warp fall;

The matter thus far described is substantially the same as that shown in the Patent:

43,675 to which reference may be had for" i i be madetherein by those skilled 'inithe art amore complete understanding of the dobby.

My present invention relates more particu-' larly to a guide and a support for link 15, and

in'carrying my invention into effect I provide 1 a saddle or support"ha ving side members or plates 41 and 42wbetween which ext-ends air oun'ded notch engaging cross bar 43 and alsoa weight 44w The latteris at that end. of the saddle opposite 'thecross bar 43 and the slot- 45 between-the side links receives-the jack 11.7, The upper surfaces of'thesides 41 1 and'42are curved as at 46, extending downwardly'from the cross bar-'43 so that the weight 44' lies at a substantial distance beg low; the cross bar. The length offtheslot 45 is somewhat greater than the width of that partof the ia'ck extending therethrough, so

that the j I addle will assume the downwardly inclined position shown in Fig.1;

, applying the saddle a will be Slipped over the upper end of the jack. and the cross bar 43 inserted in one of the slots,- after which 7 thcweighted end is released to fall downand engage the edge 47 of the jack'opposite the notch 12. When in this positionthe centerof gravity "of the "saddle will light below the 1 cross bar, this relationlefi'ectively holdingthe saddle in position on ing dislodgement, I r V Thelink difi'ersfrom that shown in the the jack and preventpatent inthat ithas upper'and lower lugs V i 50 and 51,. respectively," which lay on oppo- V site sides of thecenter line of the link. The

lower lug will ordinarily be in alignment with the ,cross bar 43, so that when the jack is moving to the :rightzas viewed in Fig. 1, a strain will be placed upon the linktlie effect of which is to cause lug 51 to hold the cross 7 bar in its notch, thus preventing dislodge ment of the saddle from thejack Whilethe "latter is movingj During the oscillation of the jack 11 the lower edge 52 of thelink 15 I *will roll along the curved upper surface of thesaddle and the curvature of said surfaces issuch' that the link is held; in a substantially horizontalposition, thus maintaining a uniform she'd. 1 I c Fromqthe foregoing it'will be seen that I have provided a simple form 'ofjlink saddle own weight on the harnessjack, It will also be seen that the saddle has curved surfaces which maintain rolling contact with the link jack, but preventing the cross bar 43 from becoming dislodged from this notch. When the position of the links 15 is to be changed,

it isnecessary merely .to raise the Saddle and move it to the desired notch.

Having thus described my invention it will be seen that changes and modificationsmay without departing from the spirit andscope ited to the details herein disclosed, but what of theinventionand I do not wish to be limi 1, In [a leno motionior' a loom c d obby, a

harness jack having; notches in one edge thereof, a'l'eno loop surrounding the'fjack, and. asupport encircling the jack below the loop and havingaipart to enter a notchinf.

thejackand having'anotherpart opposite the notches weighted to engage the jack and hold the support in position; .1

.2. 'Ina leno motionfor a loom 'dobby, a harness jack having, notches in one edge thereof, a leno, loop, surrounding the ack,

and a supporting saddle under the loop and entering one of the notches and held inpo sition on the 'j ack the weight thereof, the V part-of the saddle adjacent the loop having an upwardly curved surface to engage the o loopfwith a rolling. action as the j k moves h ZlOOPQ I c In a'leno motion for'alloom dobby, a

harness jack having 3 notches .in one edge thereof, a leno loop surrounding the jack,

a saddle support having a part to'enter a, not ch-in the jack and havinganother'part to engage the edge of the jack opposite the notches, theweight of the saddle holdingthe first'named part in the said notch. V i

4, Inaleno motionfifor looms,.a harness jack, a lenoloop surrounding the jack, and asupport held to the jack under theloop and having an upwardlycurved surface to have rolling supporting relation with the loop when the latter is moved by the jack. 45. In a'leno motion for a loom dobby, a

harness jack havingmotchesfin. one edge thereof, a leno loopsurrounding the jack,

and a support under theloopfhaving a part to enter one of the notches andihaving another partto engage the edge of'the jack op posite the notches at a point below thefirst named part, the weight of the support hold ing the same in-pos'ition on the'jack.

L 6. In alenomotionfor a loom dobby,ia

harness jack' having "notches in onegedge mo v ids

thereof, a leno loopsurrounding the jack,

7' 65 for supportwhich is held in position by its and asupport'under theloop hayinga party to enter one of the notches and having an other part to engage the edge of the jack opposite the notches at a point below the first named part, the weight of the support holding the same in position on the jack, said parts being farther apart than the distance between the edges of the jack, whereby raising the second part releases the first part from its notch.

In testimony whereof I have hereunto af-' fixed my signature.

CARL J. LINDEGREN. 

